How can I use the <img> tag to display a local image in Go?
I've tried the following:
fmt.Fprintf(w, "</br><img src='" + path.Join(rootdir, fileName) + "' ></img>")
where rootdir = os.Getwd() and fileName is the name of the file.
If I try http.ServeFile with the same path then I can download the image, however I would like to embed it in the webpage itself.
我会先说我的 Go 知识充其量是很糟糕的，但我所做的少数实验涉及到这一点，所以也许这至少会为你指明正确的方向。基本上，下面的代码使用 Handle 来处理根目录中文件夹中的文件（在我的情况下是/images/）。然后，您可以在标签中进行硬编码，也可以像以前一样使用，制作第一个参数。images/home/username/go/images/<img>path.Join()images
package main
import (
"fmt"
"net/http"
"os"
"path"
)
func handler(w http.ResponseWriter, r *http.Request) {
fileName := "testfile.jpg"
fmt.Fprintf(w, "<html></br><img src='/images/" + fileName + "' ></html>")
}
func main() {
rootdir, err := os.Getwd()
if err != nil {
rootdir = "No dice"
}
// Handler for anything pointing to /images/
http.Handle("/images/", http.StripPrefix("/images",
http.FileServer(http.Dir(path.Join(rootdir, "images/")))))
http.HandleFunc("/", handler)
http.ListenAndServe(":8080", nil)
}
也许您可以使用数据 URI。
这对我有用：
package main
import (
"io"
"net/http"
"os"
)
func index(w http.ResponseWriter, r *http.Request) {
f, e := os.Open(r.URL.Path[1:])
if e != nil {
panic(e)
}
defer f.Close()
io.Copy(w, f)
}
func main() {
http.HandleFunc("/", index)
new(http.Server).ListenAndServe()
}